Thanks David, I'm sure that this would work if I had more Ss. However, with an N of 1 wouldn't that leave me with 0 degrees of freedom? I'm not sure that's possible.
-D. David Epstein said: > Normally I don't like "top posting" (leaving several screensful of > quoted material at the bottom of one's post), but it seems expedient > here. > > You've got repeated measures on a binary dependent variable, and what > that suggests to me is that you want to use either a GEE (generalized > estimating equation) or GLMM (generalized linear mixed model), with food > placement as a time-varying covariate. SAS can handle either of those > analyses, or you can download free software that will do it > <http://tigger.uic.edu/~hedeker/mix.html>. > > But I'm not sure whether you can do it with only one subject. > > Anyone else have ideas? Does this call for some sort of time-series > analysis? > > --David Epstein > [EMAIL PROTECTED] > > On Thu, 26 May 2005, Don Allen went: > >> Hi Tipsters- >> >> I need some advice on the best statistic to use. I'm doing some work >> that's outside of my normal area. I'm collaborating with a colleague >> in the Biology department and we're investigating learning in Raptors. >> In particular, red-tailed hawks. So far we have preliminary data on >> only one bird. The initial paradigm is to see if we can get the bird >> to shift its natural preference from feeding on the left side of the >> cage to the right side. First, food was available on both sides, then >> less food was available on the left and more was on the right. >> Finally, the bird only found food on the right. The bird's behaviour >> was as follows: >> >> >> >> -- Date Side first chosen >> May 6 L >> 7 L >> 8 L >> 9 L >> 10 L >> 11 L, L (two trials) >> 12 L, L >> >> B) One piece under L cup, three pieces under R cup. >> May 13 L, L >> 14 L, L >> 15 L, L >> 16 L, L >> >> C) No food under L cup, four pieces under R cup. >> May 17 L, L >> 18 L, L >> 19 L, L >> 20 R, R >> 21 R, L, R (three trials) >> 22 R, R >> 23 R, R, R >> >> My question is which is the best statistic to use to show that this >> shift in behaviour is beyond chance (alpha = .05) I seem to recall a >> program that calculated odds in an ABAB design, but I can't seem to >> find it in the Digest. Of course a simple conjoint probability >> calculation shows that the odds of six rights in a row is well below >> .05 but is there a better test to use? >> >> As usual, thanks in advance for your help. >> >> -Don >> >> >> Don Allen >> Langara College > > --- > You are currently subscribed to tips as: [EMAIL PROTECTED] > To unsubscribe send a blank email to > [EMAIL PROTECTED] -- --- You are currently subscribed to tips as: archive@jab.org To unsubscribe send a blank email to [EMAIL PROTECTED]
